Internal power supply control device having at least one lighting control device for a motor vehicle

A combination (10) comprising:

• a power-supply control device (12) including a power distribution center in a motor vehicle that acts to control appliances in the motor vehicle having light sources and monitors their functions, said power distribution center further operable to be used with incandescent lamps or with semiconductor light sources, wherein the incandescent lamps and the semiconductor light sources having different properties;
• and
• at least one electronic light-control unit (14) operating at least one semiconductor light source (36, 38), wherein said power-supply control device (12), and the appliances including the at least one electronic light-control unit (14) connected thereto are disposed in various locations in the motor vehicle and connected to one another via lines, wherein the power supply control device (12) supplies the electronic light-control unit (14) with power via a supply line (18) connected to a first connection pin (20) of said power-supply control device (12), monitors currents flowing through an additional connection pin of said power-supply control device (12), and makes use of diagnoses of an appliance connected to the additional connection pin, the electronic light-control unit (14) is connected to the additional connection pin (28) of said power-supply control device (12) via an error line (26) and checks the function of the connected semiconductor light source (36, 38) and, in the case of a malfunction, triggers a current flow in the error line (26), and said power-supply control device (12) reacts to the triggered current flow to generate an error message.